ISO 10376-2011 PDF

Full title and description

ISO 10376:2011 — Pulps — Determination of mass fraction of fines. This International Standard specifies a laboratory procedure to determine the fines mass fraction of pulps (the portion passing a nominal 76 µm aperture) using a perforated metal plate or a single‑screen fibre classifier (e.g. a Britt Dynamic Drainage Jar, BDDJ). The method covers sample disintegration, screening, drying/weighing and calculation/reporting of fines as a percentage of oven‑dry test portion mass.

Abstract

ISO 10376:2011 describes a standardized screening procedure for all kinds of pulp to determine the mass fraction of fines (material that passes a 76 µm screen or perforated plate). The procedure includes controlled disintegration, turbulent screening using a stirrer in a fibre‑classifier or equivalent, separation, drying and gravimetric calculation of fines percentage; informative annexes give precision data and comparisons with other classifiers.

General information

• Status: Published; international standard confirmed (reviewed/confirmed in 2022).
• Publication date: April 2011 (published 11 April 2011; first edition cover dated 15 April 2011).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 85.040 — Pulps.
• Edition / version: Edition 1 (2011‑04).
• Number of pages: 8 pages (ISO official record / first edition length).

Items above are based on the ISO bibliographic record and the published standard text.

Scope

ISO 10376:2011 defines the procedure to determine the fines mass fraction of all kinds of pulp by screening a disintegrated pulp suspension through a 76 µm nominal aperture (perforated plate or wire screen) using a single‑screen fibre classifier or equivalent. The standard applies to mechanical and chemical pulps and may be used for most paper samples that can be fully disintegrated; it sets out apparatus, reagents, sampling, disintegration and screening procedures, calculations and test reporting requirements.

Key topics and requirements

• Definition of fines: material passing a nominal 76 µm aperture (plate or wire screen).
• Principle: disintegrate pulp, screen under controlled turbulent flow, dry and weigh retained and passed fractions, calculate fines mass fraction (% of oven‑dry test portion).
• Apparatus requirements: fibre classifier of BDDJ (Britt Dynamic Drainage Jar) type or equivalent; sample holder dimensions, vanes and drain arrangements are specified.
• Referenced disintegration procedures: references to ISO 5263‑1/2/3 for wet disintegration of chemical and mechanical pulps and ISO 4119 for stock concentration.
• Precision and validation: informative annex on precision and a comparison (Annex B) between McNett classifier and fibre classifier methods.
• Reporting: required test report elements and calculation formulae for fines percentage (gravimetric basis).

These technical requirements and topics are taken from the published standard text and its annexes.

Typical use and users

Laboratories and quality control units in pulp and paper mills, pulp testing laboratories, research institutions and standards bodies use ISO 10376:2011 to obtain repeatable, comparable fines mass fraction measurements for process control, machine retention studies, product specification and R&D. The method supports process troubleshooting (e.g., fines buildup, drainage/felt clogging) and product property analysis.

Related standards

Normative references and related ISO documents cited in ISO 10376:2011 include ISO 4119 (determination of stock concentration), ISO 5263‑1/2/3 (laboratory wet disintegration — chemical and mechanical pulps) and ISO 7213 (pulp sampling for testing). The standard also compares its results with methods using the McNett classifier (discussed in Annex B).

Keywords

fines, pulp, pulp testing, screening, 76 µm, perforated plate, fibre classifier, BDDJ, Britt Dynamic Drainage Jar, disintegration, gravimetric analysis, retention, pulp sampling.

FAQ

Q: What is this standard?

A: ISO 10376:2011 is an International Standard that specifies a laboratory procedure to determine the mass fraction of fines in pulps (material passing a nominal 76 µm screen).

Q: What does it cover?

A: It covers apparatus, disintegration practices, screening using a perforated plate or single‑screen fibre classifier, drying/weighing, calculations, reporting requirements and informative annexes on precision and method comparison.

Q: Who typically uses it?

A: Pulp and paper mill QC laboratories, independent pulp testing labs, research organizations and standards committees — anyone needing repeatable fines measurements for process control, specification or R&D.

Q: Is it current or superseded?

A: ISO 10376:2011 is the first edition (2011). The ISO bibliographic record indicates the publication as 2011 and notes that the standard was reviewed and confirmed in 2022, so this edition remains current unless a newer edition is published.

Q: Is it part of a series?

A: It is part of the family of pulp and paper test methods maintained by ISO/TC 6 and cross‑references related ISO test methods (not a multi‑part ISO series itself, but it references parts of ISO 5263 and other pulp test standards).

Q: What are the key keywords?

A: Fines, pulp, screening, 76 µm, fibre classifier, BDDJ, disintegration, gravimetric, pulp testing.